CVE-2025-61674
published 2026-01-10CVE-2025-61674: October is a Content Management System (CMS) and web platform. Prior to versions 3.7.13 and 4.0.12, a cross-site scripting (XSS) vulnerability was identified…
PriorityP422medium4.8CVSS 3.1
AVNACLPRHUIRSCCLILAN
EPSS
0.18%
8.1th percentile
October is a Content Management System (CMS) and web platform. Prior to versions 3.7.13 and 4.0.12, a cross-site scripting (XSS) vulnerability was identified in October CMS backend configuration forms. A user with the Global Editor Settings permission could inject malicious HTML/JS into the stylesheet input at Markup Styles. A specially crafted input could break out of the intended context, allowing arbitrary script execution across backend pages for all users. This issue has been patched in versions 3.7.13 and 4.0.12.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| october | system | >= 0 < 3.7.13 | 3.7.13 |
| october | system | >= 4.0.0 < 4.0.12 | 4.0.12 |
| octobercms | october | < 3.7.13 | 3.7.13 |
| octobercms | october | < 3.17.3 | 3.17.3 |
| octobercms | october | — | — |
| octobercms | october | >= 4.0.0 < 4.0.12 | 4.0.12 |
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GHSA
October CMS Vulnerable to Stored XSS via Editor and Branding Styles
ghsa·2026-01-09
CVE-2025-61674 [MEDIUM] CWE-79 October CMS Vulnerable to Stored XSS via Editor and Branding Styles
October CMS Vulnerable to Stored XSS via Editor and Branding Styles
A cross-site scripting (XSS) vulnerabilities was identified in October CMS backend configuration forms:
- **Editor Settings Markup Styles**
A user with the `Global Editor Settings` permission could inject malicious HTML/JS into the stylesheet input at
*Settings → Editor Settings → Markup Styles*.
A specially crafted input could break out of the intended `` context, allowing arbitrary script execution across backend pages for all users.
---
### Impact
- Persistent XSS across the backend interface.
- Exploitable by lower-privileged accounts with the above permissions.
- Potential consequences include privilege escalation, session hijacking, and execution of unauthorized actions in victim sessions.
---
### Patches
The
OSV
October CMS Vulnerable to Stored XSS via Editor and Branding Styles
osv·2026-01-09
CVE-2025-61674 [MEDIUM] October CMS Vulnerable to Stored XSS via Editor and Branding Styles
October CMS Vulnerable to Stored XSS via Editor and Branding Styles
A cross-site scripting (XSS) vulnerabilities was identified in October CMS backend configuration forms:
- **Editor Settings Markup Styles**
A user with the `Global Editor Settings` permission could inject malicious HTML/JS into the stylesheet input at
*Settings → Editor Settings → Markup Styles*.
A specially crafted input could break out of the intended `` context, allowing arbitrary script execution across backend pages for all users.
---
### Impact
- Persistent XSS across the backend interface.
- Exploitable by lower-privileged accounts with the above permissions.
- Potential consequences include privilege escalation, session hijacking, and execution of unauthorized actions in victim sessions.
---
### Patches
The
No detection rules found.
No public exploits indexed.
2026-01-10
Published